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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 165 · 40 questions
TalentJR

Developer's tip (Plan, design, build, check): Find the topic: what apps are, designing apps, or logic and building. Read every screen, list or code line carefully, top to bottom. For code, write each value down step by step and check it again.

NameDateTime takenScore ___ / 40
  1. 1.💡 Does an app idea like a library due-date alert solve a real problem? (a) No (b) Yes
  2. 2.🔁 What number does this code show?
    let steps = [19, 25, 26, 57];
    let count = 0;
    for (let i = 0; i < steps.length; i++) {
      if (steps[i] >= 60) {
        count = count + 1;
      }
    }
    show(count);
  3. 3.🔁 What number does this code show?
    let steps = [87, 72, 82, 94, 48];
    let count = 0;
    for (let i = 0; i < steps.length; i++) {
      if (steps[i] >= 40) {
        count = count + 1;
      }
    }
    show(count);
  4. 4.🧪 What is the ACTUAL result of Test 2?
    🎟️ Rule: a ticket costs 50 for children under 10, and 100 for everyone else.
    function price(age) {
      if (age < 10) {
        return 50;
      }
      return 100;
    }
    Test 1: price(8) → expected 50
    Test 2: price(10) → expected 100
    Test 3: price(15) → expected 100
  5. 5.🧭 Which part of navigation hides extra links? (a) the back button (b) a tab bar (c) a menu button
  6. 6.🎯 Is this a user need or a feature: a share button? (a) a user need (b) a feature
  7. 7.♿ What does a screen reader do? (a) plays music (b) makes text tiny (c) takes photos (d) reads the screen aloud
  8. 8.💾 What does this code show? (Positions start at 0.)
    let songs = ["Kites", "Ocean", "Monsoon"];
    show(songs[2]);     (a) Kites (b) Monsoon (c) Ocean
  9. 9.🎯 An app for “everyone” with no clear user usually ___. (a) wins every prize (b) is easy to build (c) helps nobody well (d) needs no testing
  10. 10.👥 A clinic app has 40 patients, 200 doctors and 170 nurses as users. How many more doctors than nurses are there?
  11. 11.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Help page”
    2. tap Back
    3. open “Badges”
    4. open “Map”
    How many times must you tap Back to reach the main screen of this tab?
  12. 12.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 13, and 100 for everyone else.
    function price(age) {
      if (age <= 13) {
        return 50;
      }
      return 100;
    }
    Test 1: price(9) → expected 50
    Test 2: price(17) → expected 100
    Test 3: price(16) → expected 100
  13. 13.Which of these fits saving in the cloud? (a) photos on two devices (b) a draft you are typing (c) the sound on/off setting (d) notes to read offline
  14. 14.💾 Where should the app save your last game level: on the phone or in the cloud? (a) in the cloud (b) on the phone
  15. 15.🛠️ At which stage do you draw the user flow? (a) the release stage (b) the idea stage (c) the build stage (d) the plan stage
  16. 16.✏️ A box with a cross in a wireframe usually means ___. (a) a closed app (b) an error (c) a picture goes here (d) delete this
  17. 17.🎨 Fewer taps to finish a task usually means ___. (a) better UX (b) worse UX (c) a bigger app (d) more colours
  18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 540; // typed by the user
    line 2: let off = 10; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay);     (a) line 1 (b) line 4 (c) line 3 (d) line 2
  19. 19.🔢 After an app is released, which comes FIRST? (a) test it again (b) release an update (c) fix and improve (d) read user reviews
  20. 20.🗒️ You are planning version 1 of a bus tracker. Which feature can WAIT for a later version? (a) see where the bus is (b) a dark mode (c) pick your bus stop (d) show arrival time
  21. 21.True or false: a party-invite app for friends needs your location. (a) False (b) True
  22. 22.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Size → Offers → Address
    Design B: Home → Menu → Shop
  23. 23.Which of these is about UI (the look)? (a) how fast a task is done (b) how many taps it takes (c) how users feel after (d) the icon shapes
  24. 24.True or false: a draft you are typing fits saving on the phone. (a) True (b) False
  25. 25.🗒️ You are planning version 1 of a bus tracker. Which feature is a MUST-HAVE? (a) a dark mode (b) rate the driver (c) change the bus icon (d) pick your bus stop
  26. 26.🔍 Which is the odd one out? (a) write the store text (b) try every button (c) share the download link (d) put it on an app store
  27. 27.🧭 Why should every screen show where you are? (a) so users do not get lost (b) to use more battery (c) to look busy (d) to hide the menu
  28. 28.💡 Does an app idea like a bill splitter solve a real problem? (a) No (b) Yes
  29. 29.👆 The user taps the button 6 times. What number does the label show now?
    let points = 4;
    button.onTap = function () {
      points = points + 2;
      label.text = points;
    };
  30. 30.🔀 Which badge does this quiz app show?
    let marks = 82;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Bronze (b) Silver (c) Gold
  31. 31.🧭 Which part of navigation opens a list of pages? (a) a menu button (b) a tab bar (c) the back button
  32. 32.Which of these is an input? (a) a date picker (b) tap to go Next (c) the home page of an app (d) tap to Start
  33. 33.🚀 Which of these versions is the NEWEST?
    1.8.1, 0.21.5, 1.5.8, 1.14.2     (a) 1.8.1 (b) 1.5.8 (c) 0.21.5 (d) 1.14.2
  34. 34.🧩 How many buttons does this app screen have?
    [title] Add Homework
    [button] Next
    [slider] Volume
    [text box] Age
  35. 35.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Video”
    2. open “Score card”
    3. tap Back
    4. tap Back
    5. open “Match report”
    How many times must you tap Back to reach the main screen of this tab?
  36. 36.🔀 Which badge does this quiz app show?
    let marks = 42;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Silver (b) Gold (c) Bronze
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  38. 38.True or false: you talk to possible users at the idea stage. (a) True (b) False
  39. 39.🔐 Is this permission request fair or too much: calling app → contacts? (a) fair (b) too much
  40. 40.🗒️ A to-do app with no “add a task” feature is ___. (a) well planned (b) missing a must-have (c) a nice extra (d) ready to release

Answer key

  1. Yes
  2. 0
  3. 5
  4. 100
  5. a menu button
  6. a feature
  7. reads the screen aloud
  8. Monsoon
  9. helps nobody well
  10. 30
  11. 2
  12. 3
  13. photos on two devices
  14. on the phone
  15. the plan stage
  16. a picture goes here
  17. better UX
  18. line 3
  19. read user reviews
  20. a dark mode
  21. False
  22. 1
  23. the icon shapes
  24. True
  25. pick your bus stop
  26. try every button
  27. so users do not get lost
  28. Yes
  29. 16
  30. Gold
  31. a menu button
  32. a date picker
  33. 1.14.2
  34. 1
  35. 1
  36. Bronze
  37. 24
  38. True
  39. fair
  40. missing a must-have

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students